Antiskidding-chain.



i. BROOK.

ANTISKIDDING CHAIN APPLICAYXON FILED AUELZS, |91?.

'Patented Oat. i918.

2 SHEETS SHEET 2 IRVINE BROOK, 0F 2BRIGH{.Ytllfil ENGLAND. i l

ANTISKI-DDING.- CHAIN,

Speci'cation of Letters Patent.

Patented Octn 22, 1918.

Appncaiion :nea Aug-est es, 1er?. seien ne. einem,

Zt)A alllwhom it may conce/rn: l

Be it known that I, IRVINE BROOK, motor faxqlgineer, a subject of the king of Great Britain, residing nt 106 Commercial street, l, Brighonse, Yorkshire, England, have invented certain new and useful Improvements in Antiskiddingheins, oi" which the followingv is a. specilication.

This` invent-fion refers; to irriprerem'acnte in or relating to enti-sli ine' or ant tic ding devices for resilient L or the wheele ei rend Vehicles and in pnrticninr to enel). (le vices which consist of n series of bioclre een l:rented together and located in the annuler `groove or depression of e twin treed re silient tire or between two seperate resilient tires e. g. of solid rubber.

BIS-itish Patent Specification No. 8,454Lof 1911 describes the application, in the annuler 2g: :groove or depression between the two trends of e, twinftread solid rubber tire, of e series of blocks conforming in crees-section to the shape of the groove or depression between the treads and reet-ing therein, the said endless chain by Ineens of links pivcted in o eninge formed longitudinnlly tl'irongh the bkoclgs or alternatively .in recesses in the ende of the blocks, the inner faces; and sides of l@ vthe blocks being adapted to beer against the bottom and sidesfofthe groeve or le res senbetwn the treads and the Outer me snitebly'serrated, rougbened, or studded, 0ccnpying such e position relative to-the IQ, seid treillis;` i. FOR vthis purpose the inwardly 4blocks being connect-ed together to form enporticne e311 the blocks which are necessiry for the purpose of connecting the blockstogether to'erln the endless chain and it may 'be for the purpoec also of' stifening the trend portion and 'which extend into the :annular groove or depression are so formed ne to provide gebeten itl clearance between the eine# en enfle of sniil embrione and` the, Sider 4 il or" the treads as..

Specification it 8454 of ,i911 aforesaid. 75

-f "The preeent iiwention is illustrated in the' 'accompanying drawings; ne applied to fzrvo seperate time v'.. e. rubber.

Figure l .is e. side elevation of half n wheel, partly broken away showing in pl'aee upon the wheel en endless chain of blockssome of which are in section-constructed according tothe present'invention. Fig. 2 is en` edge View partly broken away/.ot the wheelentl chain, shown in. Fig.

` lfig i side elevation, partly in Section, of e block, illustrating one Inode of connect ing the blocks together end. completing `the endless chain; l

Figs. t and are respectively en end-ele ration and n. plan View o the block conf` struction shown in Fig., 3, :rnd

Fig. 6 is e perspective View of' the block. Referring to the clmiwings the w'heelji's shown as` provided with two segerete solid; rubber tires 2 and 3 by wey of exemple and across the annular groom/1e or'V depreswsion 4 between the two tires 1s :irren theend-. less chain of blocks. Each ble@ wmp.

n twin tireof Solid e treed portion `5 et such e .Width es t0, i i

snicentbearing on the crowns o` thetigree portions on the a road vehicle it is 2 and 3 and the outer surface thereof may be roughened, serrated, grooved or the like to further prevent slipping. The edge of the inner surface is preferably rounded olf as shown at 6 to avoid any tendency on the part of the tread'portion to cut the rubber. The edges 7' of the tread portion 1nay, in the circumferential direction', be given any suitable contour adapted to still further prevent either slipping orskidding or both for instance as shown in Figs. 2, 4, 5 and (5.

In' order that the tread portionsniay be connected together to forni the endless chain they are provided with inwardly projecting portions extending into the groove 4. These projecting portions may be such as may be necessary for the sole purpose of forming the endless chain or, it may be, for the purpose also of stilfening the tread portions. In any case it is essential that such projecting portions should beso formed as to provide substantial clearance between the sides and the inwardlyextending ends of suoli one hand and the sides and bottom of. the groove 4 on the other hand as clearly shown in Fig. 2 so that the whole portion of the load transmitted through the tread portions 5 may be borne on the crowns of the tires 2 and 3. This condition being fulfilled the block s may be connected together through such inwardly projecting portions as aforesaid to form 'the endless chain in any suitable manner. As an example theblocks areshown connected together by pivoted links as described in the aforesaid Britisi Patent Specification No. 8,454 of 1911.

Each tread portion 5 is provided for example with an inwardly projecting U- shaped web 8 and the links 9 are pivoted bctween the arms of the web on rivets l() for example. The endless chaininay be conipleted by any suitable and convenient device. For instance as described in the-faforesaid Patent Speeication No. 8,454 of 19.11 the last link 9 (see Figs. 1. and 3) has one end formed -with an fopen ended slot or recess 11 arranged in a radial direction with respect to the wheel and adapted to register over a pin rivet or the like fastening l2 extending between the arms of the web 8 on vthe -frst or adjacent block of. the chain. The

link 9 isjkept in positionover the pin l2 by a set-screw 1.3 with the head counter.

sunk intov the tread portion The blocksl may be made of metal or other suitableV material-. i l

Although the endlessl chain of blocks has been shown and dcscribed'as applied to two separate solid rubber tires ou the wheel of to be uiuflerstood that the endless-chain of blocks according to the present invention isi-applicable toany tire in-tread or plural or multiple tread type.

.creep about the Blocks employed and constructed according to this inventlon present an even and regular surface to the road and do notl in- -creasc any jarring or bumping as the wheel rotates while at the same time ping-'or skidding. From an inspection of Figs. l to (i inclusive, it will be observed that the tread portion 5 of each block is solid and extends laterally, in opposite dircctions,a substantial distance from the inwardly projecting portion; or, in other words, from the connecting land strengthening portion 8, as this projecting port-ion has been referred to. Said portion 8 is integral with the tread portion 5, extends the fiill length. of said tread portion 5 and is of inodilied V or modified U shape form, as is readily ascertaiiiable from an inspection of Figs. et and 6, and it is sometimes referred' to as the inwardly projecting V-shaped portion. When the blocks are in position the closed portions of the V are innermost. The inwardly projecting portions of adjacent blocks are connected by fiat links, as 9, which lenter the slots of said projecting portions, and it will be noted that` the slots in said V-shaped portion are only a* little' wider than the links Which enter therein. The result of this fiat Ilink construction is that each block is free to move radially inwardly, as pressure in an inward directionis applied to theblocks. Under these conditions treads of the reresilient tire will yield readily inwardly behind the block. However, due tothe flat10o link construction, it will be apparent that cach block is prevented from torsional or angular inoveinentas about a radial line passing through theblock on the one hand and the center ofthe wheel or tire about 105 which the endless chain is located. vSuch a link construction as that just described opposes o'i' prevents any ot' the blocks becoming displaced or twisted ina manner to prevent slipcram p 'orY wedge against the inner sides of 110 the portions of the tire treads defining the groove or depression )4; and thus avoids any likelihood of injury to said adjacent portions of the tire. By'preventingor opposing a torsional or angular movement ot' the 115 biol-kit will b e observed that the endless chain ot' linked-together blocks is free to periphery ot' the tire without imparting injury to the tire.

iV-hat I claim is:`

v y12o An endless vnon-skidding chain, on a re- -silieiit (ire comprising a plurality of Atreads constructed and arranged so as to provide 'an annular jacent treads, which chain is constructed of v'125 #blocks linked together-.in Ia manner to pergroove or depression between adinit an inward .or radial movement of the Ablocks but in ainanner-to oppose torsional or angular movement about ya radial line,

each of'which blocks has -a solid tread oor- 130 ton and an inwardly projecting connecting able bearings on the crowns of `adjacent and strengthening portion of modied V treads and further so characterized that Said shape that enters the groove or depression inwardly projecting portions are so formed 1o between said adjacent treads with the closed as to substantially clear the sides and bot- 6 portions of the V innermost, said blocks 4betom of the annular groove or depression be- 4lng so characterized that the tread portion tween the treads.

` of each `is of sucient Width to aord suit- 1 4IRVIN E BROOK. 

